Rubber Round-Button (C-Style) Sprue Base, 2-1/2" 60 mm Diameter

Introducing the Rubber Round-Button (C-Style) Sprue Base—2-1/2" (60 mm) in diameter—for leak-proof support in investment casting. This base fits both regular and perforated flasks, keeping the sprue rod securely positioned during pouring.

Built from tough, heat-resistant rubber, it withstands repeated casting cycles for centrifugal casting and vacuum lost wax casting processes. The C-style round-button design maintains alignment of the sprue rod, reducing movement and improving pour consistency. A reliable seal minimizes leakage and helps preserve investment integrity throughout the pour.

• Leak-proof rubber construction for dependable pours
• Fits regular and perforated flasks
• Helps hold the sprue rod securely in the flask
• Ideal for centrifugal casting and vacuum lost wax casting
• Durable, heat-resistant material for repeated use

Enhance your casting workflow with this sturdy sprue base—add it to your toolkit today and experience steadier pours and better molds.